US4552689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically conductive inorganic filler containing propylene polymer compositions
Assignee: Mitsubishi Chemical Corp
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Filing: 1984-10-24
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Granted: 1985-11-12
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Expires: 2004-10-24
Abstract
Abstract An inorganic filler containing propylene polymer composition which comprises 25 to 90% by weight of component (A) and 75 to 10% by weight of component (B): (A) at least one member selected from the group consisting of (a) a crystalline propylene copolymer composed of propylene and one or more other alpha -olefins; (b) a composition prepared by blending the copolymer (a) with a synthetic rubber and/or crystalline polypropylene; and (c) a composition prepared by blending a crystalline polypropylene with a synthetic rubber, wherein (1) the amount of xylene extractable soluble component at 23 DEG C. is 10 to 50% by weight, and (2) the propylene content in the extractable soluble component is 30% by weight or more, (B) an inorganic filler having an average particle size of 200 mu or less, measured by light transmission in a liquid-phase sedimentation system.
Inventors
- 👤 Hiroshi Yui
- 👤 Yoshihiro Sobajima
- 👤 Osamu Higashide
- 👤 Tsuyoshi Imamura
- 👤 Michiya Okamura
- 👤 Satoru Hattori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:13
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/20; H01B1/24; C; C08; C08K; C08K3/00; C08K3/01; C08K3/013; C08K3/02; C08K3/04; Y; Y10; Y10S; Y10S505/00; Y10S505/80; Y10S505/801; Y10S505/802
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
158 words
An electrically conductive composition comprising 2 to 100 parts by weight of electrically conductive carbon black to 100 parts by weight of a composition which comprises 25 to 90% by weight of component (A) and 75 to 10% by weight of component (B): (A) at least one member selected from the group consisting of (a) a crystalline propylene copolymer composed of propylene and one or more other α-olefins; (b) a composition prepared by blending the copolymer (a) with a synthetic rubber and/or crystalline polypropylene with a synthetic rubber, and (c) a composition prepared by blending a crystalline polypropylene with a synthetic rubber, wherein (1) the amount of xylene extractable soluble component at 23° C. is 10 to 50% by weight, and (2) the propylene content in the extractable soluble component is 30% by weight or more, (B) an inorganic filler having an average particle size of 200μ or less, measured by light transmission in a liquid-phase sedimentation system.
Claim 2
Dependent Claim
158 words
An electrically conductive composition comprising 2 to 100 parts by weight of electrically conductive carbon black to 100 parts by weight of a composition which comprises 25 to 90% by weight of component (A) and 75 to 10% by weight of component (B): (A) at least one member selected from the group consisting of (a) a crystalline propylene copolymer composed of propylene and one or more other α-olefins; (b) a composition prepared by blending the copolymer (a) with a synthetic rubber and/or crystalline polypropylene with a synthetic rubber, and (c) a composition prepared by blending a crystalline polypropylene with a synthetic rubber, wherein (1) the amount of xylene extractable soluble component at 23° C. is 10 to 50% by weight, and (2) the propylene content in the extractable soluble component is 30% by weight or more, (B) an inorganic filler having an average particle size of 200μ or less, measured by light transmission in a liquid-phase sedimentation system.
Claim 3
Dependent Claim
23 words
An electrically conductive composition of claim 1, wherein the amount of the electrically conductive carbon black is 4 to 50 parts by weight.
Claim 4
Dependent Claim
19 words
An electrically conductive composition of claim 1, wherein the electrically conductive carbon black is SCF, ECF or Ketjen Black.
Claim 5
Dependent Claim
25 words
An electrically conductive composition of claim 1, wherein the electrically conductive carbon black has a specific surface area of 850 m 2 /g or more.
References Cited (Backward Citations)
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US3963647A
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US4321162A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-11-11 | 1989-05-13 | 1989-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-11 | 1993-05-13 | 1993-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-11 | 1997-05-13 | 1997-11-12 | $7700.00 | Window Closed / Lapsed |